Remove MappedFile support for mapping files for write and exec

and shared.  This complicates the design, is not used, and probably
doesn't even work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49022 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Debugger/SourceFile.h

@@ -52,7 +52,7 @@ namespace llvm {
     SourceFile(const std::string &fn, const GlobalVariable *Desc)
       : Filename(fn), Descriptor(Desc), File() {
         std::string ErrMsg;
-      if (File.open(Filename, sys::MappedFile::READ_ACCESS, &ErrMsg))
+      if (File.open(Filename, &ErrMsg))
         throw ErrMsg;
       readFile();
     }